The reality star and his ex, Kourtney Kardashian, celebrated their first child’s birthday with an insane gift. Scott Disick and Kourtney Kardashian-Barker’s son Mason is growing up so fast. Over the weekend, the reality star, 41, and Poosh founder, 45, celebrated their son Mason’s 15th birthday as well as the 10th birthday of their son Reign, who were both born …

“Now on to high school,” wrote ‘The Kardashians’ star on Instagram as he posed with his son outside Nobu Scott Disick is celebrating an important milestone in his eldest son’s life. On Thursday, June 6, Disick, 41, shared a congratulatory post to celebrate his son Mason Dash, 14, graduating from middle school. “Congratulations 2 my best friend in the world …